Provided is a data transceiving method performed by a station (STA) in a wireless LAN system. The method comprises: receiving subgrouping parameter information from an access point (AP); determining whether a frame buffered in the STA subgroup in which the STA is contained exists or not based on the subgrouping parameter information; receiving a TIM element in a channel access interval for the STA subgroup from the AP if the buffered frame exists; and exchanging the AP and the frame in the channel access interval based on the TIM element.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A method for receiving data in a wireless local area network system, the method performed by a station (STA) operating in a power save mode comprising: receiving, from an access point (AP), a beacon frame including a Traffic Indication Map (TIM) element, a group ID field, a transmit power field, and a channel access information field, wherein the group ID field indicates a STA group including a plurality of STAs, wherein the TIM element includes a TIM bitmap field indicating whether there is a buffered frame for at least one STA belonging to the STA group, wherein the transmit power field indicates a maximum transmit power assigned for the STA group, wherein the channel access information field indicates an access duration for the STA group; determining whether there is a buffered frame for the STA based on the TIM element and the group ID field; and transmitting a power save poll (PS-poll) frame to the AP during the access duration when there is a buffered frame for the STA according to the maximum transmit power.
2. The method of claim 1 , wherein the beacon further includes an association identifier (AID) field indicating a range of AIDs for the STA group.
3. The method of claim 1 , further comprising: entering into a doze state when there is no buffered frame for the STA.
4. A station (STA) for receiving data in a wireless local area network system, the station comprising: a transceiver that transmits and receives radio signals; and a processor, operatively coupled with the transceiver, that: instructs the transceiver to receive, from an access point (AP), a beacon frame including a Traffic Indication Map (TIM) element, a group ID field, a transmit power field, and a channel access information field, wherein the group ID field indicating a STA group including a plurality of STAs, wherein the TIM element includes a TIM bitmap field indicating whether there is a buffered frame for at least one STA belonging to the STA group, wherein the transmit power field indicates a maximum transmit power assigned for the STA group, wherein the channel access information field indicates an access duration for the STA group; determines whether there is a buffered frame for the STA based on the TIM element and the grouping ID field; and instructs the transceiver to transmit a power save poll (PS-poll) frame to the AP during the access duration when there is a buffered frame for the STA according to the maximum transmit power.
5. The STA of claim 4 , wherein the beacon further includes an association identifier (AID) field indicating a range of AIDs for the STA group.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
November 26, 2012
November 22, 2016
Browse 5M+ US patents with plain-English claim translations and AI-generated analysis.